NDA2024MathematicsSequences and SeriesActual
Let p= In (x), q= (x^3 ) and r = (x^5 ) , where x>1 . Which of the following statements is/are correct? A. p, q and r are in AP. B. p, q and r can never be in GP. Select the answer using the code given below:
Options
- AA only
- BB only
- CBoth A and B
- DNeither A nor B
Correct answer
C. Both A and B
Step-by-step solution
We have given, p = n x , q = n x ^3=3 n x r = x ^5=5 x Clearly, q - p = r - q =2 lnx p , q and r are in A.P. Also, since q p r q p , q and r can never be in GP.